What color is better for the lens of sunglasses?

The different effects and functions of sunglasses with different lens colors: (the brown, smoke and green series are the best)

Smoke lens: Smoke lens could absorb any chromatogram evenly, which means the view would be darker but there is no obvious chromatic aberration. Therefore, it could offer the real and natural feeling to the wearer. Smoke color belongs to the neutral color series, which could absorb all the IR and most UV without changing the original colors of the scene. Sunglasses with smoke lenses are mild and natural which are popular among people when they travel around.

Brown lens: Brown lens could filter most blue light, by which the visual contrast and clarity could be improved. It has a better effect when the air pollution is serious or in a foggy weather. It could block the reflected lights on a bright and smooth surface, which could guarantee the wearer to see things clearly. Thus it is the best choice for drivers. It could absorb the entire purple and green lights, and almost all the IR and UV. With soft tone, it could relax eyes. And it is the excellent safety eyewear lens.

Green lens: Green lens can increase the amount of green light that arrives in eyes at the same time of absorbing lights. So it could make its wearer feel cool and comfortable. It is good for people whose eyes could easily become tired.

Blue-gray lens: Blue-gray lens is similar with smoke lens, which are both belong to neutral lens, but only with a darker color and more absorption rate.

Mirror lens: The surface of the mirror lens applies mirror coating with high density. Mirror lens could absorb more reflected visible lights, which makes it perfect for people who love outdoor activities.

Yellow lens: Yellow lens could absorb UV entirely and most blue light. After the blue light is absorbed, the vision could be clearer. That explains why yellow sunglasses are popular among people who love hunting and shooting! To be strictly, yellow lens does not belong to sunglass lens for it could hardly reduce the amount of visible lights. But in the situation of foggy weather and at dusk, yellow lens could improve the contrast and offer more precise images. Therefore, it has another name, snooper scope. Some young people wear “sunglasses” with yellow lenses for decoration.

Light blue and light pink lens: Light blue and light pink lens are lenses for decoration rather than for practical use. The function for blocking UV and IR of red series lenses with red series is not as good as that of the smoke, brown and green lenses. But since pink is soft, it has a more psychological effects than practical effects.

Dark green lens: Dark green lens could absorb the IR entirely and 99% UV, and could block red and green lights. In this way, the colors of the scene would be changed. But since the hot steam is absorbed, it could make people feel cool. It is a good choice when basking but not when driving for its low transmittance and clarity.

Blue lens: Blue lens is good for having fun on beaches. It could filter the light blue color reflected by the sky and the sea.Prescription sunglasses with blue color should be avoided for it would make us unable to distinguish the colors of traffic lights.

CR-39 began the change of optical lenses from glass to plastic materials. It is
lighter weight, more impact resistant than glass lenses; thus, becoming a popular
type of material used in single vision, bifocal, and multifocal or progressive lenses.

Material is low price and easy to manufacture. It is often preferred by individuals
on a tight budget. However, because of its 1.50 index, customers with high prescription
powers are recommended to use higher index lenses such as 1.56, PC, 1.67, or 1.74
lenses.

CR39 Lenses Features are:

Fragmentation: When plastic lens breaks, it breaks into larger
fragments than their glass counterparts. Furthermore, the fragmented pieces are
not as sharp as glass.

Fogging: CR39 lenses are less likely to fog-up than glass
lenses because it responds more favorably to temperature changes.

Weight: Glass lenses are approximately 2X heavier than plastic
lenses of similar size and shape. The lighter weight provides the wearer greater
comfort.

Tinting: CR39 lenses are great for tinting. Lenses can be
tinted to virtually any color. Even lenses with variable thickness are able to be
tinted evenly.

If you want thinner, lighter lenses, and have an milder prescription, then mid index
lenses are the way to go. As prescription increases, the lenses become thicker.
Thicker lenses increase internal reflections that reduce vision quality. Furthermore,
thicker lenses add to the weight of each pair of glasses reducing comfort. Mid-Index
lenses refract the light at a greater angle allowing the wearer to have a beautifully
thin and light pair of glasses.

Mid Index Lenses Features are:

Fragmentation: When plastic lens breaks, it breaks into larger
fragments than their glass counterparts. Furthermore, the fragmented pieces are
not as sharp as glass.

Fogging: Mid Index lenses are less likely to fog-up than glass
lenses because it responds more favorably to temperature changes.

Weight: Glass lenses are approximately 2X heavier than plastic
lenses of similar size and shape. The lighter weight provides the wearer greater
comfort.

Tinting: Mid index lenses are also tintable, so you can get
that pair of sunglasses you’ve been eyeing for so long.

Polycarbonate lenses has a high index of refraction 1.59 and low density making
PC lenses 20% thinner and 25% lighter than regular plastic lenses. Polycarbonate
lenses are the most impact resistant lenses on the market. Therefore, it is the
industry standard for safety goggles, and highly recommended for kids' lenses.

Polycarbonate Lenses Features are:

Impact Resistant: Polycarbonate material was originally made
for uses on canopies covering fighter planes and then made its way into space on
astronaut visors and space shuttle windshields. Today it is readily available to
the public. It impact resistance makes the material extremely suitable for sports,
industrial safety goggles, and children's eyewear.

Scratching: The reason for polycarbonate lenses' impact resistance
is because of its "softness". Softer materials will flex instead of fragment when
met with great force. However, the property allows lenses to be scratched easily.
Therefore, every single one of our polycarbonate lenses is multi-coated with hard
coating that forms a protective layer around the lenses allowing the lenses to be
free from scratches while retaining its impact resistant qualities.

UV Protection: Polycarbonate lenses inherently carries UV
protection properties that blocks nearly 100% of the UV rays from entering the back
of the retina.

If you want thinner, lighter lenses, then high index lenses are the way to go. As
prescription increases, the lenses become thicker. Thicker lenses increase internal
reflections that reduce vision quality. Furthermore, thicker lenses add to the weight
of each pair of glasses reducing comfort. Hi-Index lenses refract the light at a
greater angle allowing the wearer to have a beautifully thin and light pair of glasses.

High Index Lenses Features are:

Fragmentation: When plastic lens breaks, it breaks into larger
fragments than their glass counterparts. Furthermore, the fragmented pieces are
not as sharp as glass.

Fogging: High Index lenses are less likely to fog-up than
glass lenses because it responds more favorably to temperature changes.

Weight: Glass lenses are approximately 2X heavier than plastic
lenses of similar size and shape. The lighter weight provides the wearer greater
comfort.

Reflections: High Index lenses have much lower internal reflection
and surface glare than glass materials.

Tinting: High index lenses are also tintable, so you can get
that pair of sunglasses you've been eyeing for so long.